AUGUST 6, 2025
Even as technology continues to advance in robotic surgery, new research demonstrates that robotic-assisted surgeries for unicondylar knee arthroplasty (UKA) did not result in improvement in postoperative pain, decreased opioid use and shorter hospital length of stay (LOS) compared with manual surgery (OrthoMedia 2022 May 24. doi:10.1302/3114-221335).
“Robotic arm-assisted UKA has emerged as a technological advancement, with studies consistently demonstrating more accurate and reproducible
Even as technology continues to advance in robotic surgery, new research demonstrates that robotic-assisted surgeries for unicondylar knee arthroplasty (UKA) did not result in improvement in postoperative pain, decreased opioid use and shorter hospital length of stay (LOS) compared with manual surgery (OrthoMedia 2022 May 24. doi:10.1302/3114-221335).
“Robotic arm-assisted UKA has emerged as a technological advancement, with studies consistently demonstrating more accurate and reproducible implant placement compared to manual techniques,” the authors wrote. “It is hypothesized that this precision, potentially leading to minimized bone resection and soft tissue trauma, may contribute to diminished postoperative pain and faster recovery. However, the existing literature presents a conflicted view on these clinical benefits.”
In the real-world cohort retrospective review, the investigators examined data from 1,369 opioid-naive patients who underwent medial or unilateral UKA at a single institution between 2019 and 2023, including 417 manual and 952 robotic-assisted procedures.
The investigators collected data on numerical rating scale scores, opioid consumption in morphine milligram equivalents and hospital LOS, and used multivariable linear regression to compare the outcomes after controlling for patient-level confounders.
The results show there was no statistically significant difference between the two groups in hospital LOS (P=0.6206) or total 90-day opioid consumption.
However, participants in the robotic-assisted group had slightly higher pain scores at their first postoperative measurement (estimate, −0.7; P<0.001), but there were no significant differences observed in average, minimum or maximum in-hospital pain scores.
“In this large single-institution analysis, robotic assistance was not associated with improvements in postoperative pain, opioid use, or length of hospital stay compared to the manual technique,” the authors wrote. “These findings suggest that potential benefits of robotic UKA related to implant accuracy may not translate to improved short-term clinical outcomes, a crucial consideration in the context of technology acquisition and healthcare costs.”
—Kenny Walter
